초록

Many studies have been conducted on the design of wind turbine blades and the several forces necessary for the operation of a wind turbine and its integrated load analysis such as thrust and torque generated at the design point. However, studies on the effect on such several forces by the drag force of a horizontal axis wind turbine blade have not been sufficient. The analysis of the drag effect of an airfoil on the rotational torque and thrust of wind turbine blades requires more precise design performance and drive performance of wind turbines. Therefore, it is necessary to review the degree of effect of airfoil drag force on rotational torque and thrust during the development of wind turbine blades. In this study, a wind turbine blade with the original airfoil KA2 was developed and manufactured for a performance test and the drag effect of an airfoil on the rotational torque and thrust of the horizontal axis wind turbine blade was analyzed. It was confirmed that the drag effect on torque is larger than that of thrust and that the effect of the drag force to the lift force is larger from the root to the tip.

키워드

고유익형, 풍력 블레이드, 항력의 영향, 공력특성, 토크

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